In the UK, coke is Charlie 'cos of a comic character called Charlie Chalk... coke is white and looks like chalk, so Chalk/Charlie Chalk/Charlie.
Same for speed (not crystal meth). Referred to as Whizz (for reasons duh_), and a character in a comic is called Billy Whizz, so is often called Billy/Billy Whizz/Whizz.
[This message has been edited by VolcanoPreston (edited 17 August 2001).]
[This message has been edited by VolcanoPreston (edited 17 August 2001).]